And apparently this restriction has just been extended to posts as well... I just got a red message blocking me from posting with an "open proxy", a few minutes after having done it successfully. (that made me lose a post that took me a few minutes to write, search for references and all. )

I've removed blutmagie from my exit-nodes and it works. (btw, is it possible to remove it only when accessing forum.bitcoin.org?)

Now, I must ask: isn't it too harsh to block posts? I mean, the newbie restriction is already enough to protect other boards... I don't see a need to ban Tor, which is used by so many legitimate participants of the bitcoin forum.